He definitely set you on the right path with the PHB (his first link), DMG (the second), and MM (the third). Definitely, definitely read most of your info from the PHB as it has most of the core mechanics in it for use. The DMG is a guide made to help to be DMs learn exactly what they want out of their campaign and players.

Word of advice, read portions of it and inquire to others who've played it before what their take of it is. From my personal experience, the best game play comes from mostly followed rules and a bit of homebrewing, if you followed every rule in the book, you'd be stuck rolling for some of the simplest things.

Additionally, your best experience will come from playing instead of running since DMs have a lot more work to do. If you have any questions feel free to ask me, I've played 3.5e, Pathfinder, 4e and 5e. Most knowledgeable in 3.5e and Pathfinder though.